einsum_test, a MATLAB code which calls einsum(), which applies Einstein summation for various linear algebra operations, including vector inner and outer products, matrix-vector and matrix-matrix multiplication, matrix transpose, matrix diagonal, matrix trace, row and column sums, Hadamard matrix (elementwise) multiplication.
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einsum, a MATLAB code which applies Einstein summation for various linear algebra operations, including vector inner and outer products, matrix-vector and matrix-matrix multiplication, matrix transpose, matrix diagonal, matrix trace, row and column sums, Hadamard matrix (elementwise) multiplication. This version is by Stephane Nachar.